We look at the division of 394090 by 51 
We're looking to find how many times 51 goes into 394090.

Let's proceed to step 1:
51 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 51

Moving on to step 2:
51 goes into 39 0 times with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Append the next digit (4) from the dividend to 39 and continue with: 394 / 51

Step 3:
If we divide 394 by 51, we get 7 and a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 37 after subtracting 357 from 394.
Append the next digit (0) from the dividend to 37 and continue with: 370 / 51

On to step 4:
When dividing 370 by 51, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 77.0
If we take 357 away from 370, we end up with 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 51

Step 5:
If we divide 139 by 51, we get 2 and a remainder of 37.
Put 2 as the next digit of the answer. 
Result so far: 772.0
If we subtract 102 from 139, we get 37.
Take the next digit (0) from the dividend and append it to 37, then repeat: 370 / 51

Going ahead to step 6:
370 divided by 51 is 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 7727.0
Subtract 357 from 370 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
When dividing 130 by 51, we get 2 with a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 7727.2
If we take 102 away from 130, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 8:
51 goes into 280 5 times with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 7727.25
If we subtract 255 from 280, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 9:
When dividing 250 by 51, we get 4 with a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 7727.254
If we take 204 away from 250, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 10:
51 can be fit into 460 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 7727.2549
Subtracting 459 from 460 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 11:
10 divided by 51 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 7727.2549
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 12:
The number 51 fits into 100 1 times, leaving a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 7727.254901
Subtracting 51 from 100 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 13:
When dividing 490 by 51, we get 9 with a remainder of 31.
The next digit of our result is 9. 
Result so far: 7727.2549019
If we subtract 459 from 490, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 14:
When dividing 310 by 51, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 7727.25490196
Subtract 306 from 310 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

In conclusion, the division gives 7727.25490196 with a balance of 4e-09.